I am a fan of buying a new Cheap suitcase or duffle for the return trip home. I do it all the time. Rarely have I paid over over $25 for one. Maybe have your wife's parent scout out a cheap one before your arrival. That of course would depend on their personalities and if they would like doing that sort of thing. Then "resign" yourselves to immediately donate it when you get home. My problem sometimes is that I sometimes don't get rid of them quickly enough and they take up much needed, extra valuable closet space. Good luck.